Spring clamping device



. (No Model.)

I. W. HEYSINGER. SPRING GLAMPING DEVICE.

No. 423,054. 121116111911 Mar. 11, 1890.

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port the clamping device.

ISAAC W. HEYSINGER, OF PHILADELPHIA, PENNSYLVANIA.

SPRING CLAMPING DEVICE..

SPECIFICATION forming part of Letters Patent No. 423,054, dated VMarch 11, 1890.

' Application filed July 27, 1889.

To @ZZ whom it may concern.-

Be it known that 1, ISAAC W. HnYsINGnR, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have made a certain new and useful Improvement in Spring Clamping Devices, of which the following is a full, clear, andfenact description, reference being had to the drawings which accompany and form a part of this specification, in which- Figure 1 is a vertical section through the middle from front to rear of a clamping device embodying my invention, in which the same is mounted upon a base-board adapted to receive and hold large sheets of paper or the like. Fig. 2 is a view from above of Fig. 1, partially broken away to show the working parts beneath, the upper parts indicated in part in dotted outline. Fig.. 3 is a vertical cross-section along the dotted line X X of Fig. 1. Fig. 3 is a similar section through the end screw G of Fig. 2. Fig. i is a hori- Zontal section taken on line Y Y of Fig. 1. Fig. 5 is a view similar to Fig. 1, in which .the base is of metal, forming an integral part of the clamping device'proper. 1 view from above of the spring detached, and Fig. 7 is an end view of the same.

The lettering in all the figures is uniform.

My invention relates to the construction of a spring clamping device adapted to be permanently attached to a boardor the like for holding sheets of paper, or, if desired, to be made Without such extended board, in which the parts shall bemore readily put together with less iitting or hand-work than is usual in such devices, and inwhich a better clamp is secured, and one in which the sides of the clamping-jaws are self-adjusting to papers or the like of different bulk or thickness at the opposite sides. Y

Referring to the drawings, A, Figs. 1 and 2, is a board of wood, pasteboard, or the like large enough to support a sheet of paper. To the upper free margin is attached on the under side are-enforcing strip B, which is adapted to receive the screws G and G and sup- When the board A is made very thick. or in the form shown in Fig. 5, this re-enforce B may be dispensed with. Above this strip B, midway between the'sides of the board A, is attached by the Fig. 6 is a Serial No. 818,885. (No model.)

neath, where it rests upon the upper surface of A, and provided in rear with abackwardly and downwardly projecting piece, (shown in Figs. l, 2, and 4,) which terminates in an opening D', by means of which the device is adapted to be suspended from a nail when not in use, and which rests upon the table when in use by the point D2 and prevents downward pressure upon the thumblever C from tilting up the opposite end of A. The form and method of attachment are best shown in Fig. 3, As seen in Fig. 3, this hollow spring-support D, which is open be= neath, is provided above with two lateral slots D7 DT and a central slot D6. As shown in Figs. 1 and ai, the slot DG is continued downward in front, at D5, in the face of the upright D3. This upright D3 forms a straight vertical wall, against which the sheets of paper engage at their forward margins when thrust beneath the clamping-jaw and form an even regular pile or series. To prevent sheets from passing beneath thelunder inargin of D3, (the spring F tending to raise the forward edge of D from the board A,) two indenting-points D4 D4 are formed upon the lower edge of D3, near thejsides thereof, and these by the insertion of the screws G and G are forced into the surface of the board A, closing this opening so that the papers cannot enter between the support D3 and the board A. The slot D5 D6 is carried backward until terminated in rear by the rib D10 in the middle thereof, as shown in Figs. 3 and 4. The rib D10 forms a support for the spring, as will be hereinafter described. At each end the support D is provided with a perforated ear DS and D, through which the screws G and G pass and secure the clampV to the board A. The ear D9 is iiat beneath, (see Figs. 8 and 4;) but the opposite ear D8 is provided with a longitudinal groove, as shown in Figs. 3 and 3, which groove entends through the space occupied by the screwshank G and into the liollowpart occupied IOO is higher than the opposite one G on account of this groove beneath.. The groove D8 (see been inserted.

' F4. As the projecting wires F F bear againstA Figs. 3 and 3) is provided with a shoulder D, forming a socket for the end of the spring-supporting pin E when the same has This pin E, being inserted through the groove of the ear D8 before the support D is attached to the board A, passes across, and when the front end rests in the socket D12, Fig. 3, the rear end will occupy the socket DU.

The thumb-lever C', provided with clamping-jaws C, turned downward to form a broadfaced clamping-edge upon the top surface of the board A, is shown in Figs. l and 2. preferably formed of a cast-metal plate. In the middle, at C2, is an opening in the upper surface having downwardly-extended walls O3 C4 in front and rear, closed beneath by the i V-shaped bearing C5, Fig. 1, the sides being open. Vhen the thumb-lever rests over the support D, the downward loop or extension C2 C3 C5 enters the slot D6, and the apex O5 rests against or nearly against the upper surface of the board A. The pin E, inserted as above described, will pass through the V- shaped bearing of the loop O5 and prevent the lever C from being lifted, while the same may be vibrated upon the pin E as a pivot.

The spring is shown detached in Figs. 6

and 7. It consists of a double-coiled spring 1 F and F4, the coils of which are reverse to i each other, having the rearwardly and up wardly projecting wires F and F at the ends,

and the rearward loop formed by the sides F5 F5 and the rear cross-piece F2, the whole being formed from a single piece of wire. In use the ends F F are seated, as shown in Figs. 1, 3, and 5, in notches on the under side of the lever C, in rear of the pivoted bearing, while the loop F2 is hooked over the rib D10 at the rear end of the slot D6. (See Figs. 1 and 3.) The-coils F F4 surround the pin E,

while the V-shaped bearing of the lever C\ occupies the space between the coils F and the sides of the thumb-lever C while the support is at (15in the middle, it is obvious that the broad clamping-jaw C will be held down at the sides by these spring-wires F F', and that if either sidebe raised the corresponding springwire will operate to bring it down again, irrespective of the operation of the other spring-wire upon the opposite side of C. To put the device together, the spring F is g iirst inserted from beneath into the. springsupport D, the wires F F projecting upward through the slots D7 D7, and the loop F5 and F2 of the spring forced upward until, by the yielding of the wires F F against the front of the slots D7 D7, the part of the spring F2 escapes above the rib D10 and, springing backward, hooks itself thereupon. The V-shaped loop of the lever C is now inserted downward through the slot D6, and the rear of the thumblever-C raised so that the front side C3 of the V-shaped bearing occupies the slot D5 in the wall D2, the clamping-jaw C hanging over and downward in front. The wires F F are It isI placed in the notches C6 C6, and the pin E inserted by its rounded point through the groove in the ear D8, enters the coil F of the spring, passes through it, then passes through the V-shaped bearing of the loop of the thumblever C5, then through the opposite coil F4, and finally seats itself in the socket D12. The rear end of the pin passes through the groove of the earDSand seats itself in itssocket D, the wires F F of the spring F acting to draw the ends .of the pin E into place. The thumb-lever C', being now brought down, raises the jaw C, and, the clamp being placed at the edge of the board A over the re-enforce B, it is securelyscrewed down thereto by the screws Gr and G', which draw the points Dl D4 into the surface of A and give the clamping-jaw O a iirm springbearing against the upper side of A, the tilting backward of the thumb-lever in screwing down the screws throwing the spring F underl tension.

In Fig. 5 the invention is shown as applied to a simple cast-metal base, the parts A and D being formed integral with each other. In

are employed, and I do not rigidly confine myself to the specific construction herein shown and described, but modify the same, as would be done by any mechanic skilled in the art, to suit special requirements without departing from the principles of my invention as herein shown, described,and claimed.

Having now described my invention, what I claim, and desire to secure by Letters Patent, is

1. In combination with the board A B, the support D, open beneath, having rearward and downward extension D2 on a level with the under surface of B, integral with said support D, spring F, pin E, clamping-jaw C, loop C5, pivoted in said support D, and thumb-lever G, extended to the rear and operating above said rearward extension D2, substantially as and for the purposes described.

2. In combination with hollow support D, open beneath and having central slot D6, the clampin g-j aw O,and thumblever O,and downwardlyprojecting loop for-ming V shaped bearing beneath the level thereof, said bear-1 ing adapted to be inserted from above in said slot DG, together with cross-pin E, inserted transversely along said support D from beneath, supported at the ends in said support D, and the said V-shaped bearing C5, supported beneath said pin E, together with coiled spring F, surrounding said pin E, havn ing one abutment against said thumb-lever and the other against said support D and opening, substantially as and for the purposes described. 4

3. In combination with the longitudinal IOO IIO

support D, hollow beneath and having central slot D6 and lateral slots D7 D7, the spring F,

having coils F and F4, and interposed space formed by the bend F5 F2 F5, and terminal wires F F, and the pin E, supported at the ends thereof in sockets D11 D12 and surrounded by the coils F and F11 of said spring, together with the clamping-jaw C, having thumb-lever C and downwardly-extended loop C2 O2 C5 open at the sides thereof, said loop inserted in said slot D6 and said pin E passed through the same, the Wires F F of said spring passed outwardly through said slots D7 D7 and supported by spring tension against the under surface of C at C0 C0, and the cross-piece F2 lof said spring supported on lip D10 of said support, substantially as described.

et. In combination with the hollow longitudinal support D, open beneath and having slot DG and sockets D11 and D12, opening downwardly, and groove Ds beneath, opening at one end into socket D11, the spring F, having double reversed coils F and F4, projecting terminal wires F F central bend F5 F2 F5, and thc clamping-jaw C, having opening C2 in its upper surface, and downward loop C3 C'1 C5, open transversely, said loop adapted to occupy said slot D0, together with pin E, extended through said loop and having the ends thereof supported in said sockets D11 D12, the said pin adapted to beinserted-or removed through said groove D8, and said coils F and F1 of said spring surrounding said pin E when in place, the free ends F F supported in notches C0 C0 of said clamping-jaw in rear of said loop, and said bend F2 of said spring supported by the said fixed support D, substantially as described.

5. In a spring clamping device, a'pivoted clamping-plate C, having opening C2 in its upper surface and a downwardly-extended loop formed'by the front and rear extension C2 and C4, joined together at the bottom to form the pivoted bearing C5, open at the sides` thereof,in combination with a spring-support D, a transverse pin E, supported at the ends in said support D, the middle thereof eX- tended through said loop C5 CL1 of said clamping-plate C and forming a pivoted joint in said bearing (J5, and a spring adapted to operate against said clamping-plate, substantially as described.

6. In combination with clamping-jaw C,

having thumb-lever C downwardlyextended loop C5 C1 C5, closed in front and in rear and open at the sides thereof, and notches C0 O0, the spring-support D, pin E, supported therein, spring F, having opposite coils F F4, free ends F F', and backward loop F5 F2 F5, surrounding said pin E, said loop F2 sustained by said support D, and said free ends F F adapted to engage with said notches O0 C0 in rear of said pivoted bearing C5 and compress said clamping-j aw C against said baseplate A, substantially as described.

7. As an article of manufacture, a spring clamping device consisting of base A, spring and pin support D, attached rigidly thereto, said support concave beneath and having Vslot D0, rib D10, and open sockets D11 D12, formed integral therewith, pin E, the ends thereof adapted to be supported against upward strain in said sockets D11 D12, the middle thereof extended across and beneath said slot D0, clamping-plate above having clamping-jaw C, thumb-lever C', opening C2, loop C2 C1 C5, open at the sides thereof beneath said plate C, and notches C0 O0, formed integral therewith, together with spring having opposite coils F F1, surrounding said pinE between the ends and middle thereof, central loop F5 F2 F5, extended backward, the cross part F2, sustained upon said rib D10, the free terminal wires F F', projecting backward and upward at the sides thereof, adapted to engage in said notches D0 D0, said clampingplate C pivoted to said support D by the insertion of said pin'E transversely through said bearing C5 thereof, the whole so constructed as to compress the said clampingjaw C against said plate A by the action of the spring terminals F F and to permit independent vertical motion of the said sides of the said clamping-jaw by independent action of one or the other of said spring-wires F F, substantially as described.

ISAAC W. HEYSINGFR.

Witnesses:

M. B. FENNINGER, I. L. HnYsrNGER, 

